The GEBCO_2019 Grid is the latest global bathymetric product released by the General Bathymetric Chart of the Oceans (GEBCO) and has been developed through the Nippon Foundation-GEBCO.
The GEBCO_2019 product provides global coverage, spanning 89° 59′ 52.5”N, 179° 59′ 52.5”W to 89° 59′ 52.5”S, 179° 59′ 52.5”E on a 15 arc-second grid. It consists of 86400 rows x 43200 columns, giving 3,732,480,000 data points. The data values are pixel-centre registered i.e. they refer to elevations at the centre of grid cells.
Historical GEBCO data sets
GEBCO’s first global bathymetric grid, the GEBCO One Minute Grid, was released in 2003. Since then a number of GEBCO grids have been published.
A global grid at 30 arc-second intervals. Originally published in 2014, last updated in April 2015. The data set is largely based on a database of ship-track soundings with interpolation between soundings guided by satellite-derived gravity data. Where they improve on this model, data sets generated from other methods are included.
|Grid name||Latest release year||Grid interval|
|GEBCO One Minute Grid||2008||One arc-minute|